Changes:

	- misc fixes in readmem, pb, etc

	- remove the obsolete getregs code

	- $G remains buggy, will be fixed later.
	  gdb seems to never use it as far as $P works

	- full vCont support.

	  Well, this was easy, except even after 3 hours
	  of debugging I can't understand why this change
	  breaks the stepping over pthread_create :/
	  Otherwise it seems to work.
	  Will continue tomorrow.

Next: software watchpoints.

Oleg.